Rotary gas-engine.



0. F. BDQVIST.

' ROTARY GAS ENGINE. APPLICATION I'ILED'MAY 13, l19l3.

Patented' A1`A1g-25, 1914u 4 SHEETS-SHEET 1.

U. P. BDQVIST. ROTARY GASy ENGINE. APPLICATION FILED vMAY 13, 1913.

1,108,152. Patented Aug.25,1914

4 SHEETS-SHEET 2.

. Awww i M msgstr o. REDQVIST.

ROTARY GASBNGINE. APPLIGATION FILE-D MAY 13, 1913 1,1081, 1 52. Patented Aug. 25, 1914.

4 SHEETS-SHBET 3.

O. P. EDQVIST. ROTARY GAS ENGINE.

APPLICATION FILED MAY 13. 191s.

Patented Aug. 25, 1914 4 SHEETS-SHEET 4.

fw@ yzor.-

oLoF F.' EDQvIsT, or DENVER, COLORADO.

ROTARY GAS-ENGINE.

Specication of Letters Patent.

Patented Aug. 25, 1914.

` Application inea may 1a, 1913. seriai No. 767,290.

'To all whom it may concern Be it known that I, OLor F. EDQvIsT, a subject of the King of Sweden, residing in the city and county of Denver and State of Colorado, have invented a new and useful Rotary Gas-Engine, of which thefollowing is a specification.

This invention relates to improvements .in rotary combustion engines.

The object -of the invention is to provide an engine of this character, comprising a cylinder or a plurality of cylinders rotatably mounted on a fixed or stationary shaft, said cylinders having pistons and means for so connecting them to the shaft that each of said pistons is given a plurality of cycles or reciprocations, during each complete revolu` tion of its cylinder, whereby explosive mixture is drawn into said cylinders, compressed, exploded, and expelled therefrom, thereby causing said cylinders to revolve upon said shaft, valved ports being provided for admittin i explosive mixtureto said cylinder, at pre etermined times, and for discharging the exploded gases therefrom at predetermined times,

Further, to yprovide an engine comprising a circular casing rotatably mounted on a stationary shafthaving a central crank portion, diametrically opposite pairs of cylinders being supported Within said casing, having pistons, rock arms being mounted on-said shaft which are connected at their ends to the rods ofthe adjacent pistons, means being employed for'connecting said rock arms and the crank portion of said shaft, means also being providedfor admitting explosive mixture to said cylinders at predetermined periods, -whereby explosions in the c vlinders cause their revolution about thc shaft, the. connection of the pistons with l the crank portion of the shaft causing them to make. four cycles or reciprocations during each revolution of the cylinders.

These objects -are accomplished by the mechanism illustrated in the accompanying drawings,- in which :k

.Figure 1, is a vertical, longitudinal sectional view of the improved engine. Fig. Q, is a transverse sectional view on the line 2-2 of Fig. 1. Fig. 3, is a similar sectional view on the'line 33 of Fig. 1. Fig. 4, is an interior view of one half member of the casing detached from the shaft. the cylinders being removed for clearer illustration. Fig. 5, is an exterior view of Fig. 4. Fig. (5,

is a side View of the casing, showing the intake pipes connecting the hollow portion of the vshaft with the orts back of the cylinders. Fig. 7, isasi eview onamuch smaller scale, showing the exhaust pipes which leadrfrom the exhaust port to the muflier. Fig. 8, is a perspective View of a portion of the stationary shaft, showing more clearly the cams for operating the inlet and exhaust valves. Fig. 9, is a front view of one of the double cranks which connect the pairs of rock arms. Fig. 10, is a perspective view of one of the links which connect the double cranks with the crank portion of the shaft. And Fig. 11, is a plan view of the plate for holding the valve casings in place.

Similar letters of reference refer to similar parts throughout the several views.

Referringto the accompanying drawings, the numerals 1 and 1A designate standards, in which is rigidly mounted a shaft 2, having a central crank portion 3, one end of said shaft having an axial bore or chamber 4, and apertures 5, which extend throughthe shaft to saidchamher, the purpose of said chamber being fully set forth hereinafter.

Upon the shaft 2, is revolubly mounted a circular casing, comprising semi-circular members 6 and 7, which are connected by bolts 8. which pass through transverse ribs 9, which extend across the ends of said members. Spokes 10 and 10A, which radiate from hubs 11 and 11A, are secured to opposite sides of thecircular casing, and the hubs 11 and 11^ are mounted on the shaft 2, the hores of said hubs being of enough greater diameter than the'shaft to provide space for pairs of inner and outer rings 12 and 13 respectively, provided with registering ball races between which are placed anti-friction balls 14, the rings 13 fitting tightly in the hubs 1, while the rings l12 fit tightly upon the shaft'. Upon the hub 11 is rigidly secured a gear wheel 15, which meshes with a pinion 16 on a shaft 17, mounted in a bearing in the adjacent standard 1, the shaft 17. ybeing the power-transmitting shaft, as will be understood. The semi-circular members 6* and 7, which form the circular casing, comprise spaced parallel members, which are not only integrally connected by the ribs 9, but also by integral base blocks 18 and 19,

which are diagonally opposite. and whoserespective'faces are parallel with eachother. 'lhese bases support cylinders 20 and 21, respectively, the rear ends of which fit into circularf recesses `h'ii'rued said-bases and vthese cylinders are formed `with flanges 22, which are secured to the bases and 'thus sercure the cylinders thereto. A'Ports' 23, ex-

tend longitudinally through the bases from one cylinder to the other, and com municat.

ing withfeach ,eftheseports ,are inlet anderer-.

haust valves 24 and 25 respectively, which are seated in casings 26, Which`iit'int0 cir# cular ,recesses in the bases. The valve cas? lingshave tubulare'ztensions 27 through and beyond which the-valve stems 28 extend-"and upon 'the ends'of these stems arez screwed i nuts 29, betWeenW'hich-andthe'endwalls'of the valve casings 'are interposed expansion' c'oil springs |30," which lnormally hold the valves u on` their'seats. -1 The valvei'casin'gs are held r1n the'fbasesby metal plates 31', hav# lng `bifurcated+ends, as shown 'in Fig.' 11,

which straddle thet'ubula'r extensions 27, the 'plates 'being 'screwed tothe bases.' 'The inlet valve casin'g's 'have apertures 32,Whieh 4comm'unixite With inlet ports `3'3'in the bases, and the' exhaust' valve casings have aper# tures 34C, which communicate with exhaust ports 3 5, in' t-heop'posite endso' the bases rom theinlet'port's.I 'lllhe 'valvesf24l1 .and 25 are operated in the followingmannerRQCk shafts'f36 1and 37 'y respectively'A are pivotally `.moui`1ted on ,each

of the" n1embers"6` and "7A lof thee-circular cas- 1ng,'sovthat the two shafts on each member are in axial line, and the shafts 'on onemem- ,ber-are' diametrically opposite those onthe other member. 'I Upon thein'nerends of these rock`shafts, are"secu'i'ed'leverl arms 38' and'` 39 respectively," which normally'engage the v 'ends of the valve stems 28. V:Upon the outer endsvof these. rock shafts are arms 40' and 41 respectively,"which stand atA right anglesto the'lever arms 38and 39,' v`so` that'the 'rock arms 'With thel arms on their' inner and outer ends -are practically in'the nature of bell cranks. vlo the Jfree ends of the arms 40 and 41 are ivotallysecured the outer ends 'of'push ro' s 42 andd, the inner ends" of which extend through guide 'a vertl'lres in lugs 44,*for'med on diametrical y opposite sidesk of plates 45, Whichjarefs'ecured on ythe inner ends of the hubs `11 and "11A of the casing. The inner ends of the p ushrods 4:2 and 43 engage arms 46 and 4:7 respectively, Whichfaregpivotally yconnect-ed at their outer ends to vthe plates '45." rlhe inner ends of these arms carry anti-friction rollers 48,' lthe arms '4,6 onthe intake'side4 of the casing being in lirnefwgthy a'hcam'j49, n'the'shaft' 2, While the arms 4701i the exhaust side of the Casin are 'in' linef'vvith/acam 5,0,oI1Qsaid l shaft, asA clearlysh'ovvn by `Figs; 1 land, 2. Thus, when the arms 46 andl 47 are engaged by the' ca 'ms`49and 50 respectively, they are thrown outward, carryingl ,with them the push rods 42 and l13,.,Which rock `the shafts 36 aud37, and theleverjarm's' and 39am Y g License 'thereby-l caused.toipress the ends of the valve stems and lift the valves from their seats, whereby esplosive mixture is admitted .to the pair of cylinders on one side of the casing,;or\iexploded gases exhausted from the cylinders on the opposite side of the casing,

Las thecasejmay be.

Thecylinders 42,0 and '2l arej `Wth"tle"usual'type' of pistons 51 and 52 respectively, to which are. pivotally connected piston rods 53 andll'respectively/,Whichextend slightlybeyond lthe cylinders,land "each pairL Aof,diamet1fically`,opposite'rods are connecte'd at`-'theii' lbuter zends to' rock arms.: 55,

, 'which y are' ppivotally 'niounted' upony the y shaft ny-'thisfmeans the' pistons 51v in the @yiinders 20, and the pistons 52"in"thecylin ders 21,aiebp'era`ted in `unisonbut' "the pistons on one side are compressing-'While thoseon the diametricall'yl opposite side are exhausting, as will be, 'understood. The opposite ends of the'rock' arms 55 are conncctedby v tie 'rods/ 56, so to hold them'fin parallel relation@ Upon thefcrankportion Bof the'shat 2, are'piv'otally mounted a" 'pair of links'57 and 58, which, for conveniencefof connection, are

each `ruadeinj halves, "which are unitedlby screws as shoWnvin Fig. 10, but when such links are yprovided with 'ball bearings, the openings therein would vbe large enough to permit them ,to4 be passed' over'the shaft and thus allovvthem t'o be made ina solid piece. The outer ends of.' these links areinthe form of hubs,"the lengths' ofvvhich are lequal to twice the thickness ofthe links,l and `these hubs form' bearings for thelcon'nccting pins v'from the lconi'iecting members of'U-shaped v slides 67 and 68, the side members 'of which are formed with grooves 69,' Which are'V- shaped 1n cross section. These grooved side members have 'Vlshap'ed outward-ly vextending projections 70 at their ends, .Which 'lie in correspondingly shaped grooves 171, formed in guide'bars 72,' lvvhich centrallyof their length are,r mounted .onft'he shaft 2, their 'opposite'endsbeing secured to lugs 73, projeeting from the .ribs 9, which connectthe parallel membersof each' of' vthesemi-circular vsections,io'rmzing'the circular casing. Balls 'are ,retainedjinfthe grooved `sides of ae slide. by u@ vente@ projecties 70, shawn, and these Beheben against the 'Sides .of Ithe said grdoyes,` v:and '7 ythose tin thel guide i'io bars 72, and reduce the'rietiombetween the formed with threaded apertures, which open` into the-bore of the-hub, and intheseapertures are screwed glands or bushings 75, in

which are screwed the inner ends of inlet pipes-7 6, their outer ends being screwed into elbows 77, whichare threaded to the inlet apertures 33. v

Within the bore vof theI hub'll, are placed rings 78, one of Awhich bears against the circular plate 45, on the inner end ofthe hub, while the other bears against the ball bearing rings at the other end of the hub. The opposing faces of the rings are stepped, and inthe stepped portions are placed ordinary packing rings 79,l and against the rings 78 and the packing rings are placed rings or washers 80, whlch hold' the packing rlngs upon the stepped portions of the rings 78. The rings 78 are held apart by rods 81, which are reduced in diameter at their opposite ends where theypass through vthe said rings, to-` form shoulders, which bear against the rings. The washers 80 are loosely 'mounted on the rods-81, and are held apart by expansion` coil Asprings 82, which surround the rods and bear against the washers. TheA annular space between' the wash' ers 80, communicates with the hollow por, tion of they shaft 2, through `the apertures '5 in said-shaft, .and with thel inlet 'pipes 76, so that .explosive mixture,drawn through the hollow shaft from a carbureter-not shownpasses through the apertures 5, into the annular space between the washers 80, and throughthe intake pipes' and ports,

to the cylinders. With this cage form of packing ring, the bore of the hub 11A is effectively packed on each side of the openings leading to the intake pipes. The packing rings are also held in ace, and when worn they can easily and quickly be replaced with new rings.

In Fig. 7, I have shown, on greatly reduced scale, a side elevation of the exhaust side of the engine. Into the exhaust ports 3 5 are screwed elbows 83, and similar elbows 84 are screwed into holes in the gear wheel 15, which is` rigidly mounted on thel hub 11. The elbows 84 are screwed into the inner face of the4 gear wheel, as shown by dotted lines, and nipples 85 which are connected by unions 86 are screwed linto each adjoining pair of elbows 83 and 84, as shown. Against the wheel 15 is placed a muie 87, 'which is rigidly mounted on `the hub ofthe .adjacent standard 1. This mule comprises a circular blockV havino an annular-channel 88, which regi/sters w1th the apertures .in the gearwheel 15, into -which the` elbows 84 are screwed.V VAn exhaust pipe 89 isthreaded to an. aperture in the mule, which communicates with the channel 88, and this pipe may lead to any desired point or discharging the exhaust. The outer rim of the mule is preferably machined and fits tightly against the wheel 15, and its hub ortion is also machined and fits tightly against the hub 11 of the engine casing, so that tight joints are maintained at these points, which prevents the escape of the exhausting gases. Spark plu 90 and 91, are screwed into the base bloc 19 and`20, respectively, midway between the parallel members, which make up the half sections of the casing, and these plugs communicate with the ports 23, in the blocks, back ofthe cylinders. The plugs are connected by conductor wires 92 and 93 respectively, with metal conductor rings 94 and 95 respectively, which are mounted on an inv sulating ring 96, which is rigidly secured uponthe outer end of the hub 1-1^. These conductor rings fit onannular stepped portions upon opposite sides of the insulating ring 96, and are thus se arated 'by an fannular. collar 97 which is ush with the outer surfaces of the` rin 94 4and 95. An nnularl ste ed insu ating ring 98 is rigi l secured upeli) the hub of the standard 1^, ad)I jacent'to the end of the hub 11^, and at opposite points on the stev of this ring are embedded contacts 99 an 100, which are in position to be engaged by a spring contact 101, on the outer end of the hub 11^. Upon `opposite points 'of the rim of the insulating thereby closing a circuit through one of the spark plugs-and the source of energy, the currentpassing through the frame of the engine to one pole of the plug-`say the plu 90-thence through the wire 92, to the conuctor ring 94,.thence through wire 109 l to the source'of energy, and thence through wire 106 to contact 99, thus completing acircuit, which? causes a sparkin the port 23, b whichA the gas in the cylinders 20 is exp oded.- The wires 106 and 107 .pass through apertures in the insulating ring 98,

.to the contacts 99 and 100, and the conductor wire 92 connected with the plug 90 passes through an Vaperture in the insulatin ring 96,'tothe lconductor ringI 94, so as to ,out of the way of the arms y102 and 103,- when the engine 4is in operation. -v

.The operation of theimproved .gasengine 72 draw upon the slide 6.7 `and push upon the slide GS, which slides are connected respectivelyrto thedouble cran ks 59`and' 60,

whereby movement Ais imparted to the rock arms 55, in the 4direction of the rotationof the casing, but the connection between `A the rock arm and crank portionV ofv the 's haft causes the pistons. to move slower than the cylinders, an dwhen thecasing has completed a quarter rotation, the parts stand in the position shown in Fig. 3, in which the pistons ofthe cylinders 20 are at the limit of their explosion strokes, vwhile the pistons in the cylinders 2l are at the limit of their intake strokes. In the position, illustrated in Fig. 2, the slide 67 lis at the limit of its outward movement, while the slide 68 is at the limit of its inward movement. As the slide 67 draws the link 57, it isalso drawn in by the in thesame arc, the ends of said crank which are attached to the rock arms move in a much smaller arc,thus' retarding thefaction of therockarms. While the outer end of the link 57 travels in an are equal to a fourth of .a complete rotation of the casing, the outer end of thelink 5S moves only fromthe position shown in Fig. 2 to that shown `in Fig. '3, so that the result of this short movement ofy the link 38 is precisely7 the same as that accomplished by the long increment of the link 57,7 The next quarterj trliiofthe casing causes the pistons to faster than the cylinders, and as the cylindersl ving `to the reverseo'f the position sho' yin nig-2', the 'miXtunef-lini` the 'cylinderfflf"compressed, and" at the 'saine timeftlievalve"25 is opened bythe"engagementof Athef roller arm 47 wit'h'thefcam 50, andH exploded gas isdriven from theicylinders 20. Duringthe next quarter Vturn of the'casing 'explosions occur in the cylinder 21,'whilefthe va lve 24 is opened by the' engagement ofl thefroller larmfi with the cam '4.9,`to admitexplosive mixture to A the cylinders 20,. eachq'uarter rotation ofthe casing, the'parts-assinneI `the positions shown respectivelyA in "2 and 3. The links and the Adouble cranksa're of equal length .from centerfto ce'nter, by which the required movement or throw of the rock arms is effected. Having described my inventiomfwhat ll with." the haft" 'fori casing Vfini vv'diarnetri'ealilyi A opposite pairs, and

having pistons and f lrods with, rock arms otatably shaft and connecting' the" posite piston rods'in pair. ,""l"` crank lportion vof the. shaft, pranks connected to thefreeendsro said links'and to 'the rockv arms intermediate of their connection with the Skilift iildlwththe P'SO. rsfnled exhaust. VlY'GSfOl.' Sad Cylinders and amis for operating said valves at predetermined points in the rotative travel ofthe casing. '7 i 2. In a rotary combustio'nfengine,'thecomf bination withI astationaryfshaft havingfa crank, a c asingf'rotatable lon sa'id'sha'ft, cylinders supportedin said casing in diametricallyopposite pairsgand having pistons and pistonrods, rock' arms rotatable on the shaft and f connecting` the diametrica'lly opposite Piston rods-'iii Pairs; cranks Prtally" 01'1- necting said rofck'arms onoppositesides'of the" shaft, links eonn'ectingsaid cranks and the crank 'portion 'ofthe i shaft, of' for turning the links on tlreirlaxes, a'sfthe Casi ing "is "rotate'd,` whereby the'pistonsf-are caused to recil'arocate',l inlet"l and exhaust valves connected with 'saidy cylinders, and cams forI operating ysaid fvalvesliati predeter# mined i points yin f the "rotative travel of the cas-Iig S' ln. .iflf'ftly' ,.OTUSHQ. Qn'gm, the oiiibinatin -wifth a' Santoa v "shaft,'Jai-'cas-v ingr rota'tablyy n'iountedthereon, dial metificaljlyv opposite" kintegral base' "Iyne'lnf l ei's,"each ,provided'with pairs'fof 'cylinderL receiringsocke-ts, aridfports connectingsztijd sockets, o f cylinders in'. said sockets, having' pistonsnndrodsjinl. fy f 'hnus vliesin ises "c oi'i'i'rnunicatinf Vith and" wvui" iii-iet'- nn'd xhmisr .iiio

hpp( itepistonio means uSetonlie'cted", with the rock y n 'inrpi tinlg Increment tosad aims" and *11.16F the,lfljist'onsgv to reciprocate" dnri'n the rota? @bly .ported in said jc'a's'inn mi dialnetricallyfl opposite' pairs', and nio "piston-"s 'and rofds,fj and rock anisfro-tatal').eonsaid shaft and'fcon-l. r`1e `jte -ll1 at their. verfnls to dianfletfrically yoppositepiston rods, ofl double cranks pivotallyl iis connecting said rock arms on opposite sides of their centers, and links connecting said double cranks and the crank portion of the shaft, said arms being thereby rocked whereby the pistons are each given four reciprocations during each rotation of the casing.

5. In a rotary combustion engine, a stationary shaft having a crank portion, a casing rotatably mounted thereon having diametrically opposite pairsof cylinders, with pistons and rods, rock arms rotatable on said shaft and connected with diametrically opposite piston rods, double cranks connecting the rock arms on opposite sides of their centers, links connecting the double cranks and the crank portion of the shaft, guides extending across the casing, and slides connected to said links and mounted4 on said guides, whereby when the casing rotates the links are turned and the double cranks operate the rock arms so that the pistons are each given the intake, compression, explosion, and exhaust strokes, during one complete rotation of the casing.

(3. In a rotary combustion engine, a stationary shaft having a crank portion, a casing rotatable thereon having oppositely positioned cylinders, with pistons and rods, rock arms on said shaft connecting opposite piston rods'in pairs, double cranks connecting the rock arms on opposite sides of the shaft, links connecting the double cranks and the crank portion of the shaft, parallel guides mounted on the shaft and connected to opposite points of the casing, slides mounted in said guides and having eyed members which are connected to said links Where they are connected to the double cranks, whereby when the casing is rotated the links are turned upon the crank, and the double cranks operate the 'rock arms to cause four reciprocations ofr each piston during each rotation of the casing.

7. In a rotary gas engine, the combination of a stationary crank shaft having one crank pin, and a casing rotatably mounted on said shaft, adjacent to said crank, a-pair of cylinders on each side of said crank pin, the cylinders of each pair of cylinders bein arranged on opposite sides of said cran shaft and within said casing, a piston provided with an oscillating piston rod in each cylinder, a pair of rock arms mounted on said shaft and connected together to oscillate in unison with each other, and means connected with said walking beams and including aslideway mechanism arranged and adapted to permit said pairs of cylinders and pistons to rotate around said stationary crank shaft in operative four cycle order.

j 8. In a rotary combustion engine, a Stationary shaft having a crank portion, a casing rotatably mounted thereon, cylinders arranged in diametrically opposite pairs, in said casing, andhaving pistons, and rods yconnectedtherewith, rock arms on said shaft connecting diametrically opposite pairs of piston rods, cranks connecting the outer portions of said rock arms on each side of the shaft, links connecting said cranks with the crank portion 'of therv shaft, said links and cranks being of equal length from bearing center to bearing center, valves for admitting explosive mixture` to said cylinders and for exhausting exploded gases therefrom, cams on said shaft for operating said valves, spark plugs in operative connection with said cylinders, and a sparking system connected with said plugs and opera le by the rotation of the cylinders.

In testimony whereof I aiix my signature in presence of two Witnesses.

OLOF F. EDQVIST. Witnesses:

G. SARGENT Emio'rr, ADELLA M. FowLE.

BEST VILLE COPY 

